watchdog card may be initially disabled

[八戒哥哥]

The watchdog card may be initially disabled by BIOS.

 

Executing 'watchdog -T 3 -t 1 /dev/watchdog' and

'kill -9 `pidof watchdog`' will not work, the machine will still run happyly.

 

you must exeute these commands twice to make watchdog take effect.

 

I cannot find a 'WDIOS_ENABLECARD' ioctl in busybox-1.13.3/miscutils/watchdog.c.

The only ioctl operation is 'WDIOC_SETTIMEOUT'.

 59         htimer_duration = htimer_duration / 1000;
 60         ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);

 

I suggest to add a 'WDIOC_SETOPTIONS' ioctl before 'WDIOC_SETTIMEOUT',

then, we can be sure the watchdog card is enabled.

 

+58         ioctl_or_warn(3, WDIOC_SETOPTIONS, WDIOS_ENABLECARD);

  59         htimer_duration = htimer_duration / 1000;
  60         ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);

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